The nonlinear block-oriented model is applied to describe the wind tunnel system in this paper.Both of the main exhaust valve and the chock finger are modeled by the Hammerstein block-oriented models with dead-zone input in consideration of the dead-zone characteristic in the electro-hydraulic servo mechanism.The wind tunnel flow field is described by a 2×2 multi-input multi-output coupling dynamic model.The inputs of the model are the positions of the main exhaust valve and the chock finger,and the outputs...
【基金】
国家自然科学基金项目(61333006)资助~~
【更新日期】
2016-05-24
【分类号】
V211.74
【正文快照】
1引言(Introduction)
2.4 m x 2.4 m风洞是中国空气动力研究与发展中心所属的一座半回流暂冲式跨声速航空风洞,是为某些型号飞行器设计定型提供可靠空气动力学数据的重要试验设施,其结构如图1所示.为检验飞行器的气动性能,在风洞内通过人工产生并控制气流,模拟飞行器周围气体?